https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63140
Jakub Jelinek <jakub at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |jakub at gcc dot gnu.org --- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> --- Or -fno-aggressive-loop-optimizations. From your description it is hard to figure what exactly to look for in the assembly, so e.g. bisecting compiler where it stopped working is not easy.